Siegfried I of Luxembourg

Sigfried, Count of the Ardennes (922-28 October 998), also known as Siegfried I of Luxembourg, was the first ruler of Luxembourg. He was Count of Luxembourg from 963 to 998, preceding Henry V of Bavaria.

Biography
Siegfried was born in 922, son of Wigeric of Lotharingia and Cunigunda. He inherited his father's possessions in Upper Lorraine, and he acquired the rocky promontory of Lucilinburhuc, which he renamed "Luxembourg", in the mid-10th century. He used the title of Count after building a castle there in 963, and his loyal service to the Holy Roman Empire ensured that the County of Luxembourg would exist for several more centuries. His daughter Cunigunda of Luxembourg married Henry II of Germany, forming an alliance with the East Francians.